util/u_queue: add util_queue_fence_wait_timeout
[mesa.git] / src / util / futex.h
1 /*
2 * Copyright © 2015 Intel
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #ifndef UTIL_FUTEX_H
25 #define UTIL_FUTEX_H
26
27 #if defined(HAVE_LINUX_FUTEX_H)
28
29 #include <limits.h>
30 #include <stdint.h>
31 #include <unistd.h>
32 #include <linux/futex.h>
33 #include <sys/syscall.h>
34 #include <sys/time.h>
35
36 static inline long sys_futex(void *addr1, int op, int val1, const struct timespec *timeout, void *addr2, int val3)
37 {
38 return syscall(SYS_futex, addr1, op, val1, timeout, addr2, val3);
39 }
40
41 static inline int futex_wake(uint32_t *addr, int count)
42 {
43 return sys_futex(addr, FUTEX_WAKE, count, NULL, NULL, 0);
44 }
45
46 static inline int futex_wait(uint32_t *addr, int32_t value, const struct timespec *timeout)
47 {
48 /* FUTEX_WAIT_BITSET with FUTEX_BITSET_MATCH_ANY is equivalent to
49 * FUTEX_WAIT, except that it treats the timeout as absolute. */
50 return sys_futex(addr, FUTEX_WAIT_BITSET, value, timeout, NULL,
51 FUTEX_BITSET_MATCH_ANY);
52 }
53
54 #endif
55
56 #endif /* UTIL_FUTEX_H */